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Processing apparatus for processing a physiological signal

a processing apparatus and physiological signal technology, applied in the field of medical technology and signal processing, can solve problems such as interference from other more dominant noise sources

Active Publication Date: 2019-10-24
KONINKLJIJKE PHILIPS NV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a device and method for processing physiological signals to improve performance. The goal is to reduce interference from unwanted signals, such as power line noise and electrocardiogram (ECG) signals.

Problems solved by technology

For small muscles like intercostal muscles, these signals are often only a few microvolts in amplitude and can therefore be subject to interference from other more dominant noise sources, either from the measurement system, external influences, or from the human body itself.

Method used

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  • Processing apparatus for processing a physiological signal
  • Processing apparatus for processing a physiological signal
  • Processing apparatus for processing a physiological signal

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Embodiment Construction

[0061]FIG. 1 shows an embodiment of an electromyography system 1 comprising a processing apparatus 10 for processing a physiological signal using model subtraction, notch filtering and gating. The processing apparatus 10 will be described in more detail with reference to FIG. 3.

[0062]The electromyography system 1 shown in FIG. 1 further comprises two electrodes 2 for application to a skin of a subject 100. For assessment of an inspiratory respiratory-effort, an electromyography (EMG) signal can be measured via the two EMG surface electrodes 2 located at a second intercostal space 3 symmetrically with respect to the sternum 4 of the subject 100, i.e., as a parasternal measurement. The subject can be a patient suffering from chronic obstructive pulmonary disease (COPD). The two EMG electrodes 2 can be disposable electrodes which can be clicked electrically onto an EMG patch 5 or wearable device that is worn for a single or a multiple days at the general ward of the hospital or the hom...

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Abstract

The present invention relates to a processing apparatus (10) for processing a physiological signal (21) using model subtraction, notch filtering and gating. The processing apparatus comprises a model subtraction unit (11) configured to receive the physiological signal (21) and to reduce a first unwanted signal component, such as an ECG contamination, in the physiological signal by subtracting from the physiological signal a model (31) of the 5 first unwanted signal component to obtain a residual signal (32); a filter unit (12) configured to receive the residual signal (32) and to reduce a second unwanted signal component, such as power line noise, in the residual signal by applying a notch filter to obtain a filtered signal (33); and a gating unit (13) configured to receive the filtered signal (33) and to apply gating to the filtered signal to obtain a gated signal (34). The present invention further relates to a 10 corresponding electromyography system and a method for processing a physiological signal using model subtraction, notch filtering and gating.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the field of medical technology and signal processing. In particular, the present invention relates to a processing apparatus for processing a physiological signal using model subtraction, notch filtering and gating. The present invention further relates to a corresponding system and method as well as to a corresponding computer program for carrying out said method.BACKGROUND OF THE INVENTION[0002]Removal of unwanted signals from a measured signal is a commonly known action in signal processing. One application involving such action is the processing of electromyography (EMG) signals.[0003]Electromyography is a technique for determining an activity of a muscle or a group of muscles. An electromyography system detects an electrical potential generated by muscle cells when these cells are electrically or neurologically activated. Two or more electrodes are applied to obtain a differential voltage signal indicative of an acti...

Claims

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Application Information

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IPC IPC(8): A61B5/0488A61B5/04A61B5/00
CPCA61B5/6801A61B5/04004A61B5/0488A61B5/7203A61B5/0803A61B5/1107A61B5/4818A61B5/725A61B2505/07A61B2505/09A61B5/30A61B5/389
Inventor DERKX, RENE MARTINUS MARIADEVOT, SANDRINE MAGALI LAUREVAN DE LAAR, JAKOB
Owner KONINKLJIJKE PHILIPS NV
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